Diagonal knots and the tau invariant
Geometric Topology
2025-09-10 v1
Abstract
In 2003, Ozsv\'ath, Szab\'o, and Rasmussen introduced the invariant for knots, and in 2011, Sarkar published a computational shortcut for the invariant of knots that can be represented by diagonal grid diagrams. Previously, the only knots known to have diagonal grid diagram representations were torus knots. We prove that all such knots are positive knots, and we produce an example of a knot with a diagonal grid diagram representation which is not a torus knot.
Cite
@article{arxiv.2412.13796,
title = {Diagonal knots and the tau invariant},
author = {Jackson Arndt and Malia Jansen and Payton McBurney and Katherine Vance},
journal= {arXiv preprint arXiv:2412.13796},
year = {2025}
}
Comments
6 pages, 5 figures